Data reproducing system and data streaming system

• US 20050138666A1
• Filed: 11/17/2004
• Published: 06/23/2005
• Est. Priority Date: 11/18/2003
• Status: Active Grant

• Current Assignee: Yamaha Corporation
• Original Assignee: Yamaha Corporation
• Inventors: Furuta, Hiroaki, Matsunuma, Yasuhiro, Kawashima, Masatoshi, Matsuyama, Tetsuya, Narusawa, Sadayuki, Tanaka, Katsuaki
• Granted Patent: US 7,769,476 B2
• Time in Patent Office: Days
• US Class Current: 725/89
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]

Abstract

A data reproducing system includes: a receiver that receives streaming data via a network; a buffering device that buffers the received data; a reproducing unit that reproduces the data by reading the data from the buffering device; and a controller that controls a reproducing speed of the reproducing unit in response to excess and deficiency of an amount of buffer from a predetermined target value to maintain the amount of buffer of the buffering device at the target value.

Claims

1. A data reproducing system comprising:

a receiver that receives streaming data via a network;

a buffering device that buffers the received data;

a reproducing unit that reproduces the data by reading the data from the buffering device; and

a controller that controls a reproducing speed of the reproducing unit in response to excess and deficiency of an amount of buffer from a predetermined target value to maintain the amount of buffer of the buffering device at the target value.

2. The data reproducing system according to claim 1, wherein the controller controls the reproducing speed within predetermined upper and lower limits of the reproducing speed even if the excess and deficiency of the amount of buffer is increased.

3. The data reproducing system according to claim 1, wherein the controller stops the reproducing of the reproducing unit when the deficiency of the amount of buffer in the buffering device is in excess of a predetermined value, and keeps reproducing stop until data are buffered in the buffering device to exceed the target value.

4. The data reproducing system according to claim 1, wherein the data includes audio data.

5. A data streaming system comprising:

a server system that streams and outputs data to a network; and

a plurality of data reproducing systems each of which includes;

a receiver that receives the data via the network,

a buffering device that buffers the received data,

a reproducing unit that reproduces the data by reading the data from the buffering device, and

a controller that controls a reproducing speed of the reproducing unit in response to excess and deficiency of an amount of buffer from a predetermined target value to maintain the amount of buffer of the buffering device at the target value.

6. The data streaming system according to claim 5, wherein the server system streams and outputs the data to the network, and buffers data that correspond to a sum of a target value of the amount of buffer in the client system and a transmission delay time from the server system to the client system and then reproduce the data.

7. The data streaming system according to claim 5, wherein the data includes audio data.

8. The data streaming system according to claim 7, wherein the data is transmitted from the server system to the plurality of data reproducing systems through a wireless local area network.

9. A method of reproducing data comprising:

receiving streaming data via a network;

buffering the received data in a buffering device;

reproducing the buffered data; and

controlling a reproducing speed of the reproduced data in response to excess and deficiency of an amount of buffer from a predetermined target value to maintain the amount of buffer of the buffering device at the target value.